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LLVM backend for 6502
d8313be410
This change replaces getTypeStoreSize with getTypeAllocSize in AddressSanitizer instrumentation for stack allocations. One case where old behaviour produced undesired results is an optimization in InstCombine pass (PromoteCastOfAllocation), which can replace alloca(T) with alloca(S), where S has the same AllocSize, but a smaller StoreSize. Another case is memcpy(long double => long double), where ASan will poison bytes 10-15 of a stack-allocated long double (StoreSize 10, AllocSize 16, sizeof(long double) = 16). See http://llvm.org/bugs/show_bug.cgi?id=12047 for more context. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151887 91177308-0d34-0410-b5e6-96231b3b80d8 |
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